The US Food and Drug Administration approved updated Covid-19 vaccines but for a more limited group: adults age 65 and older and younger people who are at higher risk from Covid-19.

Parents will still be able to seek out shots from rival drugmaker Moderna, the other maker of mRNA vaccines, which has full FDA approval for children as young as 6 months. But the company’s Spikevax vaccine is only approved for children with at least one serious health problem.